Incubator



L. DE VRIES March 6, 1928.

INCUBATOR Filed sept. 1s,

20 out' through the exhaust Patented Mar. 6, 1928.v

" rUrlilffED' STATES PATENT "OFFICE LoUIs DE vains, or cHIciLGo,rLLiNoIs.

INcUBaToR.

Application filed September 13, 1926. Serial No. 135,024.`

air descends, thus'providing a continuous circulation; and furtherObjectis to provide the incubator with pipes" so arranged that the freshairvpipewill extend through the exhaust pipe and up `through theincubator, so as to have thefresh air automati! cally pre-heatedand-discharged into the egg chamber or main central chamber at theproper degree of temperature, andV to circulate downward through saidchamber and pipe, without the use of any forcing means.A n n V Otherobjects and advantages are accom? plished with fniy invention' asw-illbecome apparent VVwith 1 the following descriptiontakenqinfconnectionwith the accompanying drawing, in `which Fig; 1 is aplan vielwof myv invention,V

parts being broken away;l

Fig'. 2 is a; vertical sectional View, taken on line 2--2 of Fig. l; and

Fig. Sis a sectionaldetail, taken on line 3-3 ofFigQ. -1

In the present application I disclose my improved incubator in itspreferred form yof construction, and this comprises a central `cha1nberor egg `clianiberl.'y surrounded by double walls which include the mainor outer walls and the -auxiliaryor inner walls (3 connected to the saidouter walls and sup- 4o ported thereon by the use of brackets orconnecting elements `7 AThese inner walls do not reach to eithertheceiling 8 or floor 9 of the incubator. The purpose of this doui ble wallconstruction is to form a suii'icient space 10 between each two walls4for'tlie warm air to rise between said walls and to descend in thecentral chamber or egg chamber. Y

The preferred method of applying heat to 5o the air in the space formedbetween the double walls 5 and 6 consists of hot gas chambers 11 and 12,one located at each end of the incubator, and whichV are connected bytwo heat transferring pipes 13 located in the spaces between said innerand outer walls at the two sides ofthe incubator, near the bottom ofsaid walls. One or more entrancel doors for thecentral chamber isprovided.

and the door 1% is located in a side of the incubator` above pipe 13,`saiddoor being lconstructed in a manner identical to said double wall,includiiigthespaced Vinner and outer walls andthe `connecting" elementsT, and when closed fornjis la portion of said double wall, suitablehinge `means being provided and also suitable fastening means la', asindicated in Fig.` 1:- y

The means for inducing circulation of 'air comprises a foul air pipe orexhaust pipe 15 which starts in and extends across the central lowerpartof the chamber Il, having intake openingsfl, and then extendsthrough aninner end wall, downward through the floor ofthe incubator,v and thenextends be# low theffloor asia portion 15 tothe opposite end vof theincubator1 thence upward through the floor andthrough the'liotairspacel() between the inner and outer walls, and out through the upperpa-rt-'offthe end wall,

thence'over the liotgas escape or outlet port 17 and opens upwards. Afresh air pipe 18 enters the exhaust pipe 15` atv one end, of its lowerportion 157 and runsthe length thereofand emerges therefrom inside ofthe incli-v bator, then extends upwards through space 10 and is bentover near to the ceiling,` extending belowthe ceiling inY the form of aVcoil 19, the middle or inner'part 19 of saidcoilhaving perforations 20,preferably on'l the upper si e of saidpart 19f to-discharge the airAagainst theceiling of the incubator.

The outlet Yport or escaped'? is controlled therniostatically,preferablyby ajdaniper or valve 21-actuated by a lever 22and a therniostat 23which-is located in the center off the top of the egg chamber. "A heatinlet port 24 is provided in the bottoni of chamber 1,1, for receiving"heat Afrom a suitable heat producing device or means 25.

The main walls and top and bottoni of the incubator are preferablyconstructed with sheet metal s on the inside, and with a sheet ofasbestos a on the outside, or other suitable heatinsulating and fireresisting material; andthe inner walls 6 preferably consist of wood,beaver board, or the like.

The ascending column of the exhaust pipe is made longer than thedescending part, and extends from the intake portion downward to acooler position, under the incubator, and is extended for a greaterdistance up through the heating space, then the disim Y tance or lengthof the descending portion of said pipe, wherefore the air moves freelydown from the inner perforated portion through the shorter vertical partto the bottom portion 15 and then up through the longer upwardlyextending part which extends through the hot air space l0, thuspositively providing sutlicient and proper movement of the foul air outof the chamber. The exhaust outlet is furthern'lore placed over the hotair outlet 17, thus when the damper or valve 2l opens by excessive heatit additionally heats the outer part ot the exhaust pipe and therebyproduces more rapid movement of the foul air at said discharge end ofsaid pipe. 'l`he fresh air pipe extends first through the outer or lowerpart 15 of the exhaust pipe, and then extends up nearly the entirelength or height of the hot air space l0, thus producing a gradualpre-heating of the fresh air, since this pipe extends in the reversedirection o't` travel of the foul air in portion 15 of pipe 15, and thenextends upward to the hottest position of the chamber near the ceilingthereof, there discharging the heated fresh air towards the ceiling ofthe incubator. It may be noted that circulation of fresh warm airthrough pipe 1S will continue into the main egg chamber even afterdamper 21 is open,

due to the extensive length of the vertical part ot" fresh air pipe.

lt is apparent from the above disclosure that with this construction thefoul air is positively7 drawn from the lower end of the egg chamber andis positively moved outward by the exhaust pipe, and it is also apparentthat the iresh air will be preheated .in the intake pipe and said pipewill discharge the heated fresh air near the top of the chamber, whichwill then move downward through the central chamber and through the eggstherein, to be taken up and discharged by the exhaust pipe, thuscausiiig a constantv circulation of fresh warm air through the eggchamber. Furthermore, the fresh air supply pipe is made of slitticient.vlength and heatI is applied thereto, at a portion thereof sutiicientlylow to cause the air therein to enter the egg chamber at a temperatureslightly lower than that of said egg chamber. The warm air in the foulair exhaust pipe is used in part to heat the lowcl portion ot the freshair supply pipe, and the action ot' the foul air exhaust pipe isincreased by having it extend over and upward from the damper or escapevalve 21.

that I claim as my invention and desire to secure by Letters Patent is:

1. An incubator comprising a chamber with double walls forming hot airspaces around said chamber, a heating chan'iber at each end oli saidincubator, at the outside of the double walls, and heat transferring conduits connecting said heating chambersv and extending through said hotair spaces.

2. An incubator comprising a top and bottom and main walls, inner wallsspaced from said main walls, and which stop short of said top and bottomand provide a central chamber with hot air spaces around the same, aheating chamber provided outward of one main wall and having a port forreceiving heat and an escape port with a thermostatic control therefor,an exhaust pipe conducting foul air from the central chamber and havingits outlet portion extending over said escape port, a second heatingchamber on a main wall opposite the first heating chamber, and conduitsconnecting said heating chambers and located in said hot air spaces.

3. An incubator comprising main walls with a top and a bottom thereon,inner walls spaced from said main walls and which stop short of said topand bottom and provide a central chamber and hot air spaces therearound,heating chambers outward of the opposite main walls, conduits connectingsaidheating chambers and located in said hot air spaces, an exhaust pipeleading from the lower part ot the central chamber and extending belowthe bottom, then up through a hot. air space out of the incubator, andan intake pipe extending through the part o't' said exhaust pipe locatedbelow said bottom, then up through the incubator and extending belowsaid top, having outlet openings located adjacent said top.

In testimony whereof I have signed my name to this specification.

LOUIS DE VRIES.

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